252101766 rocker for XCMG ZL50G/ZL50GL Wheel Loader

product parameters

Product Name: Rocker Arm (Bucket Rocker)
Part No.: 252101766
Applicable Model: XCMG ZL50G, ZL50GL Wheel Loader
Material: Cast-forged alloy steel, quenched and tempered
Function: Serve as pivot of bucket linkage, distribute cylinder force, coordinate pull rod and linkage for bucket rotation
Matching parts: pin, bushing, grease nipple, dust seal
Working condition: Combined tension-compression alternating impact load
Inspection Items: Dimension inspection, crack detection, hinge hole concentricity test, hole distance tolerance and angle verification

Applicable Scenarios

Installed on the front section of loader boom, as the hinge pivot between bucket cylinder and linkage group. Used for earth-rock and bulk material loading. Widely applied in quarry, mine, construction site and cargo terminal under dusty heavy impact conditions.

• Machined to original kinematic geometry, accurate multi-hole spacing, direct fit without modification
• Integral cast-forged structure with heat treatment, good toughness for complex tension-compression load
• Precision reamed hinge holes, stable bushing press fit, less play and abnormal impact noise
• Optimized multi-pivot design, distribute impact force and reduce stress concentration at hole edge
• Cost-effective single part replacement, no need to replace linkage and pull rod together
• Crack inspected before delivery, tight tolerance control for bulk stock
• Fully compatible with original pins, bushings, grease nipples and dust seals, easy maintenance
• Perfect kinematic match for ZL50G / ZL50GL bucket linkage, smooth curl and dump without interference

FAQ 

Q：What symptoms occur when the rocker arm is damaged?
A：Excessive bucket play and shaking, impact noise during curl and dump, unstable dumping angle and material spillage. In severe cases, the rocker deforms and jams, bucket stroke gets disordered, bucket cylinder surges and vibrates repeatedly, and loading efficiency reduces greatly.

Q：Does bucket shaking always mean rocker arm damage?
A：No. Check pin and bushing wear, pull rod and linkage hole wear, and bucket cylinder internal leakage first. Confirm rocker damage only after eliminating these faults.

Q：Can a slightly bent rocker arm be straightened for long-term use?
A：Not recommended for heavy-duty work. Straightening destroys heat treatment stress and creates invisible micro-cracks. It may break suddenly under impact and damage cylinder and linkage. New rocker arm is required.

Q：Can rocker arms of different loader models be interchanged?
A：Not interchangeable. Multi-pivot spacing, lever angle and load design differ. Wrong fit causes stroke disorder and motion interference, which may bend cylinder or damage boom hinge seat.

Q：What should be noted during rocker arm installation?
A：Clean sand, burrs and old grease residue from all hinge holes. Inspect pins, bushings and dust seals. Align holes and install gently, avoid heavy hammering. Inject grease after assembly and test full bucket stroke.

Q：What causes rocker arm damage most often?
A：Overloading, heavy impact on hard rock, insufficient lubrication, failed dust seal allowing sand ingress, and continuous operation with excessive hinge clearance.